t1sv_4.c

快速fft变换

/*
 * Copyright (c) 2003, 2007-8 Matteo Frigo
 * Copyright (c) 2003, 2007-8 Massachusetts Institute of Technology
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

/* This file was automatically generated --- DO NOT EDIT */
/* Generated on Sat Nov 15 20:53:01 EST 2008 */

#include "codelet-dft.h"

#ifdef HAVE_FMA

/* Generated by: ../../../genfft/gen_twiddle -fma -reorder-insns -schedule-for-pipeline -simd -compact -variables 4 -pipeline-latency 8 -n 4 -name t1sv_4 -include ts.h */

/*
 * This function contains 22 FP additions, 12 FP multiplications,
 * (or, 16 additions, 6 multiplications, 6 fused multiply/add),
 * 35 stack variables, 0 constants, and 16 memory accesses
 */
#include "ts.h"

static void t1sv_4(R *ri, R *ii, const R *W, stride rs, INT mb, INT me, INT ms)
{
     INT m;
     for (m = mb, W = W + (mb * 6); m < me; m = m + (2 * VL), ri = ri + ((2 * VL) * ms), ii = ii + ((2 * VL) * ms), W = W + ((2 * VL) * 6), MAKE_VOLATILE_STRIDE(rs)) {
	  V T1, Tv, T3, T6, T5, Ta, Td, Tc, Tg, Tj, Tt, T4, Tf, Ti, Tn;
	  V Tb, T2, T9;
	  T1 = LD(&(ri[0]), ms, &(ri[0]));
	  Tv = LD(&(ii[0]), ms, &(ii[0]));
	  T3 = LD(&(ri[WS(rs, 2)]), ms, &(ri[0]));
	  T6 = LD(&(ii[WS(rs, 2)]), ms, &(ii[0]));
	  T2 = LDW(&(W[TWVL * 2]));
	  T5 = LDW(&(W[TWVL * 3]));
	  Ta = LD(&(ri[WS(rs, 1)]), ms, &(ri[WS(rs, 1)]));
	  Td = LD(&(ii[WS(rs, 1)]), ms, &(ii[WS(rs, 1)]));
	  T9 = LDW(&(W[0]));
	  Tc = LDW(&(W[TWVL * 1]));
	  Tg = LD(&(ri[WS(rs, 3)]), ms, &(ri[WS(rs, 1)]));
	  Tj = LD(&(ii[WS(rs, 3)]), ms, &(ii[WS(rs, 1)]));
	  Tt = VMUL(T2, T6);
	  T4 = VMUL(T2, T3);
	  Tf = LDW(&(W[TWVL * 4]));
	  Ti = LDW(&(W[TWVL * 5]));
	  Tn = VMUL(T9, Td);
	  Tb = VMUL(T9, Ta);
	  {
	       V Tu, T7, Tp, Th, To, Te;
	       Tu = VFNMS(T5, T3, Tt);
	       T7 = VFMA(T5, T6, T4);
	       Tp = VMUL(Tf, Tj);
	       Th = VMUL(Tf, Tg);
	       To = VFNMS(Tc, Ta, Tn);
	       Te = VFMA(Tc, Td, Tb);
	       {
		    V Tw, Tx, T8, Tm, Tq, Tk;
		    Tw = VADD(Tu, Tv);
		    Tx = VSUB(Tv, Tu);
		    T8 = VADD(T1, T7);
		    Tm = VSUB(T1, T7);
		    Tq = VFNMS(Ti, Tg, Tp);
		    Tk = VFMA(Ti, Tj, Th);
		    {
			 V Ts, Tr, Tl, Ty;
			 Ts = VADD(To, Tq);
			 Tr = VSUB(To, Tq);
			 Tl = VADD(Te, Tk);
			 Ty = VSUB(Te, Tk);
			 ST(&(ri[WS(rs, 1)]), VADD(Tm, Tr), ms, &(ri[WS(rs, 1)]));
			 ST(&(ri[WS(rs, 3)]), VSUB(Tm, Tr), ms, &(ri[WS(rs, 1)]));
			 ST(&(ii[WS(rs, 2)]), VSUB(Tw, Ts), ms, &(ii[0]));
			 ST(&(ii[0]), VADD(Ts, Tw), ms, &(ii[0]));
			 ST(&(ii[WS(rs, 3)]), VADD(Ty, Tx), ms, &(ii[WS(rs, 1)]));
			 ST(&(ii[WS(rs, 1)]), VSUB(Tx, Ty), ms, &(ii[WS(rs, 1)]));
			 ST(&(ri[0]), VADD(T8, Tl), ms, &(ri[0]));
			 ST(&(ri[WS(rs, 2)]), VSUB(T8, Tl), ms, &(ri[0]));
		    }
	       }
	  }
     }
}

static const tw_instr twinstr[] = {
     VTW(0, 1),
     VTW(0, 2),
     VTW(0, 3),
     {TW_NEXT, (2 * VL), 0}
};

static const ct_desc desc = { 4, "t1sv_4", twinstr, &GENUS, {16, 6, 6, 0}, 0, 0, 0 };

void X(codelet_t1sv_4) (planner *p) {
     X(kdft_dit_register) (p, t1sv_4, &desc);
}
#else				/* HAVE_FMA */

/* Generated by: ../../../genfft/gen_twiddle -simd -compact -variables 4 -pipeline-latency 8 -n 4 -name t1sv_4 -include ts.h */

/*
 * This function contains 22 FP additions, 12 FP multiplications,
 * (or, 16 additions, 6 multiplications, 6 fused multiply/add),
 * 13 stack variables, 0 constants, and 16 memory accesses
 */
#include "ts.h"

static void t1sv_4(R *ri, R *ii, const R *W, stride rs, INT mb, INT me, INT ms)
{
     INT m;
     for (m = mb, W = W + (mb * 6); m < me; m = m + (2 * VL), ri = ri + ((2 * VL) * ms), ii = ii + ((2 * VL) * ms), W = W + ((2 * VL) * 6), MAKE_VOLATILE_STRIDE(rs)) {
	  V T1, Tp, T6, To, Tc, Tk, Th, Tl;
	  T1 = LD(&(ri[0]), ms, &(ri[0]));
	  Tp = LD(&(ii[0]), ms, &(ii[0]));
	  {
	       V T3, T5, T2, T4;
	       T3 = LD(&(ri[WS(rs, 2)]), ms, &(ri[0]));
	       T5 = LD(&(ii[WS(rs, 2)]), ms, &(ii[0]));
	       T2 = LDW(&(W[TWVL * 2]));
	       T4 = LDW(&(W[TWVL * 3]));
	       T6 = VFMA(T2, T3, VMUL(T4, T5));
	       To = VFNMS(T4, T3, VMUL(T2, T5));
	  }
	  {
	       V T9, Tb, T8, Ta;
	       T9 = LD(&(ri[WS(rs, 1)]), ms, &(ri[WS(rs, 1)]));
	       Tb = LD(&(ii[WS(rs, 1)]), ms, &(ii[WS(rs, 1)]));
	       T8 = LDW(&(W[0]));
	       Ta = LDW(&(W[TWVL * 1]));
	       Tc = VFMA(T8, T9, VMUL(Ta, Tb));
	       Tk = VFNMS(Ta, T9, VMUL(T8, Tb));
	  }
	  {
	       V Te, Tg, Td, Tf;
	       Te = LD(&(ri[WS(rs, 3)]), ms, &(ri[WS(rs, 1)]));
	       Tg = LD(&(ii[WS(rs, 3)]), ms, &(ii[WS(rs, 1)]));
	       Td = LDW(&(W[TWVL * 4]));
	       Tf = LDW(&(W[TWVL * 5]));
	       Th = VFMA(Td, Te, VMUL(Tf, Tg));
	       Tl = VFNMS(Tf, Te, VMUL(Td, Tg));
	  }
	  {
	       V T7, Ti, Tn, Tq;
	       T7 = VADD(T1, T6);
	       Ti = VADD(Tc, Th);
	       ST(&(ri[WS(rs, 2)]), VSUB(T7, Ti), ms, &(ri[0]));
	       ST(&(ri[0]), VADD(T7, Ti), ms, &(ri[0]));
	       Tn = VADD(Tk, Tl);
	       Tq = VADD(To, Tp);
	       ST(&(ii[0]), VADD(Tn, Tq), ms, &(ii[0]));
	       ST(&(ii[WS(rs, 2)]), VSUB(Tq, Tn), ms, &(ii[0]));
	  }
	  {
	       V Tj, Tm, Tr, Ts;
	       Tj = VSUB(T1, T6);
	       Tm = VSUB(Tk, Tl);
	       ST(&(ri[WS(rs, 3)]), VSUB(Tj, Tm), ms, &(ri[WS(rs, 1)]));
	       ST(&(ri[WS(rs, 1)]), VADD(Tj, Tm), ms, &(ri[WS(rs, 1)]));
	       Tr = VSUB(Tp, To);
	       Ts = VSUB(Tc, Th);
	       ST(&(ii[WS(rs, 1)]), VSUB(Tr, Ts), ms, &(ii[WS(rs, 1)]));
	       ST(&(ii[WS(rs, 3)]), VADD(Ts, Tr), ms, &(ii[WS(rs, 1)]));
	  }
     }
}

static const tw_instr twinstr[] = {
     VTW(0, 1),
     VTW(0, 2),
     VTW(0, 3),
     {TW_NEXT, (2 * VL), 0}
};

static const ct_desc desc = { 4, "t1sv_4", twinstr, &GENUS, {16, 6, 6, 0}, 0, 0, 0 };

void X(codelet_t1sv_4) (planner *p) {
     X(kdft_dit_register) (p, t1sv_4, &desc);
}
#endif				/* HAVE_FMA */